<template>
  <div class="comment-container">
    <h3 class="title">发表评论</h3>
    <hr />
    <textarea name id placeholder="请输入要BB的内容(最多吐槽120字)" maxlength="120" v-model="msg"></textarea>
    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.add_time">
        <div
          class="cmt-title"
        >第{{ i+1 }}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;时间：{{ item.add_time | dateFormat }}</div>
        <div class="cmt-body">{{ item.content }}</div>
      </div>
    </div>
    <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>

<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageIndex: 1, //评论的页码数
      comments: [], //所有的评论数据
      msg: "" //评论输入的内容
    };
  },
  created() {
    this.getComments();
  },

  methods: {
    getComments() {
      //获取评论数据
      this.$axios
        .get("/api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(response => {
          // this.comments = response.data.message;
          console.log(this.id);
          this.comments = this.comments.concat(response.data.message);
          Toast("加载评论数据成功");
        })
        .catch(err => {
          console.log(err);
          Toast("加载评论数据失败");
        });
    },
    getMore() {
      //加载更多
      this.pageIndex++;
      this.getComments();
    },
    postComment() {
      if (this.msg.trim().length === 0) {
        return Toast("输入内容不能为空");
			}
      this.$axios
        .post("api/postcomment/" + this.$route.params.id, {
          content: this.msg.trim()
        })
        .then((response) => {
						//1.先创建一个对象
            var cmt = {
              user_name: "匿名用户",
              add_time: Date.now(),
              content: this.msg.trim()
            };
            //将新评论添加到原评论数据的头部
						this.comments.unshift(cmt);
						
            // 清空输入框
            this.msg = "";
          
        })
        .catch(err => {
          Toast("发表评论失败");
          console(err);
        });
    }
  },
  props: ["id"]
};
</script>
	
<style lang="scss" scoped>
.comment-container {
  .title {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      line-height: 35px;
      .cmt-title {
        background-color: #ccc;
      }
      .cmt-body {
        text-indent: 2em;
      }
    }
  }
}
</style>